Cone type optical structure for TDLAS gas telemetering module
By integrating the detection laser, indicator laser, camera, plano-convex lens, filter, and photodetector into a single cone-shaped optical structure, the problems of poor stability and low integration in existing gas telemetry equipment are solved, achieving high stability and high space utilization of the equipment.
Patent Information
- Application Number
- CN202323017719.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-08
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2033-11-08
AI Technical Summary
The optical structure of existing gas telemetry equipment is composed of multiple discrete structures, which leads to poor stability, high debugging difficulty and low integration, thus affecting the performance.
Design a conical optical structure to integrate a detection laser, an indicator laser, a camera, a plano-convex lens, a filter, a photodetector, etc., into a single, sealed structure, thereby improving integration and space utilization.
It improves the stability and space utilization of gas telemetry equipment, reduces system noise and maintenance costs, and simplifies the commissioning process.
Smart Images
Figure CN223827537U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure belongs to the field of optical gas sensing detection, and particularly relates to a conical optical structure for a TDLAS gas remote sensing module. BACKGROUND
[0002] At present, accidents caused by leakage of flammable and explosive, toxic and other dangerous gases in the environment have caused a major threat to the life and property safety of relevant personnel. Therefore, it is very necessary to realize rapid and accurate online detection of the concentration of the leaked gas.
[0003] The laser remote sensing module is a core component of a remote online gas measurement and analysis detection device, which is used for tunable diode laser absorption spectroscopy (TDLAS) and is widely used in various devices for detecting hazardous gases. TDLAS is based on the Lambert-Beer law and the characteristic that the wavelength changes with the injected current and temperature to realize detection of the molecular absorption spectrum, and then the concentration of the gas to be measured is calculated by analyzing the spectral signal.
[0004] At present, the optical structure of the gas remote sensing device is mainly composed of multiple discrete structures, each of which can only integrate part of the optical devices, for example, as shown in Figure 1 , wherein the optical device detection laser and the plano-convex lens are discrete structures, and the infrared filter and the photodetector need to be integrated into another discrete structure, and then all the above discrete structures need to be combined to form a complete optical structure for the gas remote sensing device. The optical structure composed of multiple discrete structures will cause the stability of the gas remote sensing device to deteriorate during dynamic testing and at the same time increase the difficulty of debugging the optical devices such as detection laser, indication laser and infrared filter.
[0005] In addition, since the above discrete structures can only integrate part of the optical devices, the integration degree is relatively low, thereby affecting the use performance of the optical structure. CONTENT OF THE INVENTION
[0006] In view of the deficiencies in the prior art, the purpose of the present disclosure is to provide a conical optical structure for a TDLAS gas remote sensing module, which integrates detection laser, indication laser, camera, plano-convex lens, filter, photodetector and the like in one, has high integration degree, high space utilization rate and can improve the stability of the gas remote sensing device.
[0007] To achieve the above purpose, the present disclosure provides the following technical solutions:
[0008] A conical optical structure for a TDLAS gas remote sensing module, comprising:
[0009] a structure body, the structure body is conical;
[0010] One end of the structure body is provided with a first fixing structure, a plano-convex lens is arranged in the first fixing structure;
[0011] The other end of the structure body is provided with a second fixing structure, the second fixing structure is sequentially provided from outside to inside with a module composed of a photodetector and a matched circuit board and a filter;
[0012] The plano-convex lens, the filter and the module composed of the photodetector and the matched circuit board are located on the same optical path.
[0013] Preferably, the first fixing structure comprises a first fixing structure body, a snap ring pressing ring is threadedly connected to the inner side of the first fixing structure body through a threaded structure 19, and the plano-convex lens is fixed on the first fixing structure body through the snap ring pressing ring.
[0014] Preferably, a lug is arranged vertically above the outer side of the first fixing structure body, first to third cylindrical countersunk holes are horizontally and equally arranged on the lug, a detection laser with a collimator is arranged on the first cylindrical countersunk hole, an indication laser is arranged on the second cylindrical countersunk hole, and a camera is arranged on the third cylindrical countersunk hole.
[0015] Preferably, support seats are equally arranged on the peripheral side of the first fixing structure body.
[0016] Preferably, an opening is arranged on the support seat.
[0017] Preferably, the second fixing structure comprises a second fixing structure body with a circular inner wall, a fourth cylindrical countersunk hole is arranged in the second fixing structure body, and a filter is arranged on the fourth cylindrical countersunk hole.
[0018] Preferably, a platform support is integrally formed on the outer side of the second fixing structure body, and the module composed of the photodetector and the matched circuit board is arranged on the platform support.
[0019] Compared with the prior art, the present disclosure has the following beneficial effects:
[0020] 1. The optical structure shown in the present disclosure adopts a conical design, which is light, simple and compact, and is composed of a plano-convex lens and an infrared filter to form a closed structure, which can effectively prevent small particles such as dust from entering the cavity, thereby reducing system noise and maintenance cost.
[0021] 2. The optical structure shown in the present disclosure integrates detection lasers, indication lasers, cameras, plano-convex lenses, filters, photodetectors and the like, has high integration degree and high space utilization rate, and can improve the stability of the gas remote sensing equipment. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a structural schematic diagram of an existing optical structure;
[0023] Figure 2 is a front view of a conical optical structure for a TDLAS gas remote sensing module according to an embodiment of the present disclosure;
[0024] Figure 3 is a structural schematic diagram of a snap ring;
[0025] Figure 4 is a rear view of a conical optical structure for a TDLAS gas remote sensing module according to another embodiment of the present disclosure;
[0026] Figure 5 is Figure 4 is a sectional view of the second fixing structure;
[0027] Figure 6 is a schematic diagram of a photodetector and a circuit board;
[0028] Figure 7 is a circuit block diagram of a conical optical structure for a TDLAS gas remote sensing module according to another embodiment of the present disclosure;
[0029] The labels in the drawings are explained as follows:
[0030] 1, power supply; 2, single-chip microcomputer; 3, detection laser; 4, collimator; 5, gas leakage area; 6, reflecting surface; 7, plano-convex lens; 8, optical filter; 9, photodetector; 10, operational amplifier; 11, indication laser; 12, camera; 13, first cylindrical counterbore; 14, second cylindrical counterbore; 15, third cylindrical counterbore; 16, structural main body; 17, platform support; 18, fourth cylindrical counterbore; 19, threaded structure; 20, support seat; 21, snap ring; 22, screw hole; 23, circuit board; 24, lug. DETAILED DESCRIPTION
[0031] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art. Figures 2 to 7
[0032] It should be noted that some terms are used in the description and claims to refer to particular components. One of skill in the art will understand that a person of skill can use different names to refer to the same component. The description and claims do not differentiate components based on the names used to refer to them, but based on the functionality of the components. As used throughout the description and claims, "comprising" or "including" is to be interpreted as "including but not limited to." The description that follows is intended to describe preferred embodiments of the present disclosure and is not intended to limit the scope of the present disclosure. The scope of the present disclosure is defined by the appended claims.
[0033] In order to facilitate the understanding of the embodiments of the present disclosure, the following will be further explained and described with specific examples in conjunction with the accompanying drawings, and each of the accompanying drawings does not constitute a limitation on the embodiments of the present disclosure.
[0034] In one embodiment, as shown in Figure 2 and Figure 4 , the present disclosure proposes a cone-shaped optical structure for a TDLAS gas remote sensing module, comprising:
[0035] a structure body 16, which is in the shape of a cone;
[0036] One end of the structure body 16 is provided with a first fixing structure, and a plano-convex lens 7 is arranged in the first fixing structure;
[0037] The other end of the structure body 16 is provided with a second fixing structure, and the second fixing structure is sequentially provided from the outside to the inside with a module composed of a photodetector 9 and an adapted circuit board 23 and a filter 8 as shown in Figure 6
[0038] The plano-convex lens 7, the filter 8, and the module composed of the photodetector 9 and the adapted circuit board 23 are located on the same optical path.
[0039] The above embodiments constitute the complete technical solution of the present disclosure. By designing a cone-shaped optical structure and arranging the plano-convex lens, the filter, and the photodetector at the first and second ends of the optical structure body to form a closed structure with the optical structure body, the present disclosure can effectively prevent dust and other small particles from entering the structure body of the optical structure.
[0040] In another embodiment, as shown in Figure 2 , the first fixing structure comprises a first fixing structure body, and a first fixing structure body is threadedly connected with a module composed of a photodetector 9 and an adapted circuit board 23 as shown in Figure 3 The clasp ring 21 is provided with external threads on the outer side, so that it can be connected with the threads on the inner side of the first fixed structure body. The plano-convex lens 7 is fixed on the first fixed structure body through the clasp ring 21.
[0041] In another embodiment, as shown in Figure 2 and Figure 4 A lug 24 is provided on the outer side of the first fixed structure body, and the first to third cylindrical countersunk holes are provided on the lug. The first cylindrical countersunk hole 13 and the third cylindrical countersunk hole 15 are arranged on the two sides of the lug, and the second cylindrical countersunk hole 14 is arranged between the first cylindrical countersunk hole 13 and the third cylindrical countersunk hole 15.
[0042] In this embodiment, the detection laser 3 with the collimator 4 is arranged on the first cylindrical countersunk hole 13, the indication laser 11 is arranged on the second cylindrical countersunk hole 14, and the camera 12 is arranged on the third cylindrical countersunk hole 15.
[0043] In another embodiment, support seats 20 are arranged on the outer side of the first fixed structure body.
[0044] In this embodiment, the support seats 20 are provided with openings, which are convenient for fixing with the shell in the later product design.
[0045] In another embodiment, as shown in Figure 4 The second fixed structure includes a second fixed structure body with a circular inner wall, and the fourth cylindrical countersunk hole 18 is arranged in the second fixed structure body. The optical filter 8 is arranged on the fourth cylindrical countersunk hole 18.
[0046] In another embodiment, as shown in Figure 4 and Figure 5 A square platform support 17 is integrally formed on the outer side of the second fixed structure body. The measurement module composed of the photodetector 9 and the adapted circuit board 23 is fixedly arranged on the platform support 17 through the screw holes 22 on the platform support 17.
[0047] In another embodiment, as shown in Figure 7 The power supply 1, the single-chip microcomputer 2, and the operational amplifier 10 are sequentially and electrically connected outside the optical structure.
[0048] The power supply, the single-chip microcomputer, and the operational amplifier used in this embodiment are all purchased from the market, and this embodiment does not involve any improvement to the structure of the power supply, the single-chip microcomputer, and the operational amplifier.
[0049] Next, the working principle of the above-mentioned optical structure is described in this disclosure:
[0050] The power supply 1 is connected with the single-chip microcomputer 2 to make the detection laser 3 arranged on the first cylindrical countersunk hole 13 work, the infrared light emitted by the detection laser 3 is shaped and collimated by the collimator 4, then the infrared light passes through the gas leakage area 5 to be detected to reach the reflecting surface 6, then the infrared light passes through the gas leakage area 5 to be detected again to reach the plano-convex lens 7, then the infrared light is focused by the plano-convex lens 7 and filtered by the optical filter 8 to enter the photodetector 9, then the current signal is output after the photoelectric conversion is completed by the circuit board 23, the current signal is amplified by the operational amplifier 10 and then enters the single-chip microcomputer 2 to be detected, so that the concentration detection signal of the gas to be detected can be obtained. In addition, the indicating laser 11 located on the second cylindrical countersunk hole 14 and the camera 12 located on the second cylindrical countersunk hole are used to assist in aligning the target position and observing the working condition environment around the target position.
[0051] The optical structure described in the present disclosure integrates the necessary components of the detection laser, the indicating laser, the camera, the plano-convex lens, the optical filter, the photodetector and the like into one, compared with the existing discrete optical structure, the space utilization is improved and the stability of the optical structure in dynamic testing is improved.
[0052] Although the present disclosure is described above with reference to exemplary embodiments, the protection scope of the present disclosure is not limited to the embodiments described above. It is obvious to those skilled in the art that various changes and modifications can be made in form and details without departing from the scope and idea of the present disclosure. The scope of the present disclosure is only defined by the appended claims and their equivalents.
Claims
1. A cone-shaped optical structure for a TDLAS gas telemetry module, comprising: The main structural element is conical in shape. A first fixing structure is provided at one end of the main body of the structure, and a plano-convex lens is provided inside the first fixing structure; The other end of the main structure is provided with a second fixing structure, and the second fixing structure is provided with a module and a filter consisting of a photodetector and an adapted circuit board in sequence from the outside to the inside. The plano-convex lens, the filter, and the module consisting of a photodetector and an adapted circuit board are located on the same optical path.
2. The optical structure according to claim 1, wherein, The first fixing structure includes a first fixing structure body, and a retaining ring is threadedly connected to the inner side of the first fixing structure body. The plano-convex lens is fixed to the first fixing structure body by the retaining ring.
3. The optical structure according to claim 2, wherein, The first fixed structure body has a lug on its outer side directly above it. The lug has a first to a third cylindrical countersunk hole. The first cylindrical countersunk hole has a detection laser with a collimator, the second cylindrical countersunk hole has an indicator laser, and the third cylindrical countersunk hole has a camera.
4. The optical structure according to claim 2 or 3, wherein, The first fixed structure body has support seats at equal intervals on its outer periphery.
5. The optical structure according to claim 4, wherein, The support base is provided with an opening.
6. The optical structure according to claim 1, wherein, The second fixing structure includes a second fixing structure body with a circular inner wall, and a fourth columnar countersunk hole is provided inside the second fixing structure body, and a filter is provided on the fourth columnar countersunk hole.
7. The optical structure according to claim 6, wherein, The second fixed structure has a platform support integrally formed on the outside of the main body, and the module consisting of a photodetector and a matching circuit board is mounted on the platform support.